Psychology must be purely experimental and analytical.

I'm not afraid of falling because I know I'll rise again.

也许不快乐的源泉正来自我们用单一的视角看世界。《旅行的艺术》

忠诚就是一切。没有它，你一无所有。

We've done price elasticity studies, and the answer is always that we should raise prices. We don't do that, because we believe -- and we have to take this as an article of faith -- that by keeping our prices very, very low, we earn trust with customers over time, and that that actually does maximize free cash flow over the long term.